Vocabulary
Structure of the Earth
Continental Drift Theory
Plate Tectonics
Miscellaneous
100
The thinnest layer of the Earth
What is the crust
100
There are ______________ main layers of the Earth.
What is four
100

He first proposed the Continental Drift Theory

Who is Alfred Wegener

100

When plates collide and one oceanic plate subducts under a continental plate  _____________ form.

What is volcanoes?

100

The Himalayan mountains are the result of __________ crust at a ___________________________ boundary.

What is continental plates at convergent boundaries?

200
A number of rigid, but moving, pieces of Earth's surface
What is tectonic plates.
200
The thickest layer of the Earth
What is the mantle.
200

Which fast moving boundary forms volcanoes when colliding with South America?

What is the Nazca plate?

200
The mid-ocean ridge is an example of a ____________________ boundary and ___________________ occurs here where new ocean floor is formed.
What is divergent boundary; sea-floor spreading
200

Earthquakes occur at tectonic plates that ______________.

What is slide past each other?

300
The theory that all continents are fragments of Pangaea now drifting apart
What is the Continental Drift Theory
300
Plates float on top of the _______________________.
What is the asthenosphere
300
Evidence of tropical plants were found on this continent
What is Antarctica
300

_________________ are a result from the build up of stress at a plate boundary.

What is Earthquakes?

300

Ship channels are dredged in order to keep the channel from getting too ___________ and ___________.

What is shallow and narrow?

400

The ocean floor at divergent boundaries separates creating new crust

What is seafloor spreading?

400
The rigid part of the Earth including the crust and the upper mantle (makes up the plates of the Earth)
What is the lithosphere
400

The supercontinent existed 250 million years ago

What is Pangaea?

400
This is the mechanism (what causes) the plates to move
What is convection cycles in the mantle
400

The San Andreas Fault in California is an example of a ____________________ boundary.

What is a transform boundary

500
Although the hottest layer of the Earth, this layer is solid metal
What is the inner core
500

When using topographic maps you can find the change in elevation by _________________.

What is finding the difference or subtracting the elevations?

500

Similar rock samples were found in West Texas and Antarctica are evidence of _______________.

What is plate tectonics?

500

The two types of convergent boundaries

What is subduction (where volcanoes often occur) and collision (where mountains are usually formed)

500

When contour lines are very close together it means the slope is ______________.

What is steep?

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